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Answer to Question #18695 in Mechanics | Relativity for Sarah

Question #18695
Rock A is dropped straight down. After 2 seconds, Rock B is dropped straight down as well. As both rocks are falling, will the separation distance between Rock A and B increase, decrease or stay the same?
Expert's answer
1 rock's equation: h1(t)=h0-gt^2/2
2 rock's equation: h2(t)=h0-g(t-2)^2/2
d(t)=h1(t)-h2(t)=g/2(t^2-t^2+4t-4)=2g(t-1)
So, it is linearly increasing

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